/**
 * NEXUS substrate adapter for the Living Brain API.
 *
 * Queries nexus.db (global) and returns BrainNodes/BrainEdges for code symbols and files.
 * Prioritises high-in-degree nodes (most-called functions, most-imported files)
 * since the full nexus graph can exceed 10k nodes.
 *
 * Node IDs are prefixed with "nexus:" to prevent collisions.
 */
import type { BrainEdge, BrainNode, BrainQueryOptions } from '../types.js';
/**
 * Returns all BrainNodes and BrainEdges sourced from nexus.db.
 *
 * Fetches the highest in-degree nodes (capped at perSubstrateLimit) and
 * all relations between those nodes.
 *
 * @param options - Query options (limit, minWeight).
 * @returns Nodes and edges from the NEXUS substrate.
 */
export declare function getNexusSubstrate(options?: BrainQueryOptions): {
    nodes: BrainNode[];
    edges: BrainEdge[];
};
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